Abstract：
:Chronic inflammation may lead to endothelial dysfunction, which manifests as an impaired coronary reactivity. Impairment in coronary flow reserve (CFR), preceding the clinical symptoms of coronary artery disease, can be measured noninvasively by positron emission tomography. Myeloperoxidase (MPO) is an oxidative enzyme present in phagocytes and atherosclerotic lesions. The MPO gene has a promoter polymorphism (-463G/A) which affects gene transcription. Whether these variants associate with coronary artery function is not known. Myocardial blood flow at rest and during adenosine-induced hyperemia was assessed in 49 healthy young men with normal or slightly elevated serum total cholesterol. These subjects were divided into high (G/G) and low (A/G, A/A) MPO expression groups and effect of MPO genotype on myocardial blood flow was evaluated. We found a significant difference between MPO genotypes in CFR after adjusting for age, body mass index, smoking and family history of cardiovascular disease (p = 0.019). Men with G/G genotype had 18.1% lower CFR than subjects with low-expression genotypes (A/G and A/A). This was due to an 11.5% lower adenosine-stimulated flow of the G/G genotype carriers (p = 0.049). These findings provide evidence that MPO polymorphism is associated with coronary artery reactivity. However, the number of individuals investigated was low and our observation should be confirmed by a larger number of subjects.
journal_name
J Biomed Scijournal_title
Journal of biomedical scienceauthors
Mäkelä R,Laaksonen R,Janatuinen T,Vesalainen R,Nuutila P,Jaakkola O,Knuuti J,Lehtimäki Tdoi
10.1007/BF02256549keywords:
subject
Has Abstractpub_date
2004-01-01 00:00:00pages
59-64issue
1eissn
1021-7770issn
1423-0127pii
75289journal_volume
11pub_type
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journal_title：Journal of biomedical science
pub_type： 杂志文章,评审
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